Cognos 10 Report Studio: Add more series to a chart

How to add more series to a chart? This is something I didn't remember and couldn't find right away, therefore I share it here.

In this example I have combination line chart and some dummy data (pics 1, 2 & 3). I want to compare number of errors (m_errorcount) in different years and months to the target line.

Pic. 1. Combination chart.

Pic. 2. Measure, categories and series added.

Pic. 3. Chart with data.

Generally there is only one series box where to drop item. I need to add another for target line data item. (See pink spots in the next pictures.)

[1] Click combination chart object and go to Properties > General. In a Combination line click three dots to see options.

Pic4. Combination chart properties.

[2] Click Add-icon and choose type of element you want to add.

Pic. 5. Combinations options, add new.

Pic. 6. Types of combination element.

[3] After couple Ok clicks, you have another element in the series box where you can add second data item (Pic.7). Last picture (Pic. 8) shows result of the example chart.

Pic. 7. Additional series.

Pic. 8. Result.